A shortage of donor organs means people may not get a transplant when they need one. That's where families are stepping in – often the best match is a sibling, parent or even a child. Joanna Moorhead talks to living donors and the loved ones they have saved

Applicants for driving licenses will now be required to state whether they want to be organ donors, following a recommendation from the government's "nudge unit", in a bid to boost numbers. Is is fair to force a decision like this?